It Is Estimated That T Years from Now, the Population $p ( t ) = 14 - \frac { 6 } { 3 + t }$

Multiple Choice

It is estimated that t years from now, the population of a certain community will be $p ( t ) = 14 - \frac { 6 } { 3 + t }$ thousand. An environmental study indicates that the average daily level of carbon monoxide in the air will be $C ( p ) = 0.5 \sqrt { p ^ { 2 } + 2 p + 30 }$ units when the population is p thousand. The rate at which the level of carbon monoxide will be changing 3 years from now is

A) -0.078 ppm per thousand people
B) 0.078 ppm per thousand people
C) 1.000 ppm per thousand people
D) -1.000 ppm per thousand people